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Time evolution of dielectric parameters during the crosslink of epoxy resins
Author(s) -
Levita G.,
Livi A.,
Rolla P. A.,
Gallone G.
Publication year - 1996
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/(sici)1099-1581(199612)7:12<873::aid-pat596>3.0.co;2-r
Subject(s) - epoxy , dielectric , materials science , relaxation (psychology) , conductivity , diamine , glass transition , composite material , kinetics , electrical resistivity and conductivity , dielectric loss , polymer chemistry , polymer , chemistry , optoelectronics , physics , quantum mechanics , electrical engineering , engineering , psychology , social psychology
Abstract The d.c. conductivity and the dielectric constant of an epoxy resin cured with a diamine were examined in a frequency interval extended up to 10 10 Hz. The analysis of the dielectric behavior has permitted gaining a better knowledge of the relationships between dielectric parameters and the physical and chemical modifications of the systems. The results indicate that the chemical kinetics of the crosslink process is closely paralleled by the change in time of the dielectric parameters so that dielectrometry provides valuable information on conversion, relaxation times, glass transition temperature and gelation.